/*
Copyright 2025 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

// Package kectl provides a method for users to use the kectl binary in a cluster.
package kectl

import (
	"context"
	"fmt"

	"github.com/spf13/cobra"

	"sigs.k8s.io/kwok/pkg/config"
	"sigs.k8s.io/kwok/pkg/kwokctl/runtime"
	"sigs.k8s.io/kwok/pkg/log"
	"sigs.k8s.io/kwok/pkg/utils/exec"
	"sigs.k8s.io/kwok/pkg/utils/path"
)

type flagpole struct {
	Name string
}

// NewCommand returns a new cobra.Command for use kectl in a cluster
func NewCommand(ctx context.Context) *cobra.Command {
	flags := &flagpole{}

	cmd := &cobra.Command{
		Use:   "kectl [command]",
		Short: "[experimental] Run kubectl-like commands directly against etcd",
		RunE: func(cmd *cobra.Command, args []string) error {
			flags.Name = config.DefaultCluster
			err := runE(cmd.Context(), flags, args)
			if err != nil {
				return fmt.Errorf("%v: %w", args, err)
			}
			return nil
		},
	}
	cmd.DisableFlagParsing = true
	return cmd
}

func runE(ctx context.Context, flags *flagpole, args []string) error {
	name := config.ClusterName(flags.Name)
	workdir := path.Join(config.ClustersDir, flags.Name)

	logger := log.FromContext(ctx)
	logger = logger.With("cluster", flags.Name)
	ctx = log.NewContext(ctx, logger)

	rt, err := runtime.DefaultRegistry.Load(ctx, name, workdir)
	if err != nil {
		return err
	}

	err = rt.KectlInCluster(exec.WithStdIO(ctx), args...)

	if err != nil {
		return err
	}
	return nil
}
